Trial ring



Sept. 14 1926.

Y N. M. BAKER yRlAL RING I Filed Nov. 26. 192:5

- INVENTOR A E M Zdkf BY 2 T 9&4 AT RNEY Patented Sept. 14, 1926.

UNETE. STATES PATENT orricn.

NELSON 1VI. BAKER, OF SOUTHBRIDG-E, MASSACHUSETTS, ASSIGNOR T0 AMERICANOP- TIGAL COMPANY, OF SOUTHBRIIDGE, MASSACHUSETTS, A VOLUNTARY ASSGCIA-TION OF MASSACHUSETTS.

TRIAL RING.

Application filed November 26, 1923.

The present invention relates to an improved form of trial ring and hasparticular reference to a trial ring wherein the lenses may be removedand replaced with ease.

An important object of this invention is to provide a trial ring of thisnature wherein the lens will be normally held securely in position whileat the same time when it is so desired, it may be removed and a new lensput in place.

Other objects and advantages of the in vention will become apparentduring the course of the following description.

In the drawings, wherein like numeral are employed to designate likeparts throughout the same,

Figure 1 is a front elevation of one form of ring wherein the handle ismolded in place,

Figure 2 is a front elevation of another form of ring wherein a rim isplaced around the same,

Figure 8 thereof,

Figure 4 is another form of ring,

Figures 5, 6 and 7 illustrate similar rings,

Figures 8, 9 and 10 show a modified form of lens retaining means,

Figure 11 shows an expansible ring, and

Figure 12 is a vertical transverse section therethrough.

In the drawings, wherein for the purposes of illustration are shown thepreferred embodiments of my invention, the numeral 15 designates a ringformed from bakelite, wherein the metal handle 16 may be molded in thering 15, or it may be riveted on the outside by means of the rivet 17which is shown in dotted lines. A suitable flange 18 is provided to forma seat for a suitable lens.

In Figure 2 the numeral 19 designates the bakelite ring around which isclamped a metal rim 20, which is held in place by means of the bolt 21,said ring terminating in a handle 22. A lens 28 is pressed in orcemented in place upon the flange 24: of the ring 19. In Figure 8 thering 19 is splited as at 25 to allow the said bakelite ring to expandslightly to allow for the insertion of a lens, after which the bolt 21is securely fastened, thus drawing the rim is a slightly modified formSerial No. 677,160.

20 together and securely holding the lens in place.

In Figure 4 the ring 26 and the handle 27 are formed from an integralstructure having a slit 28 connecting between the aperture 29 and thehole in the handle 27. As is shown in Figure 6, a flange 81 is providedto hold a lens in position. It will be seen that by reason of the slit28, the ring 26 may be enlarged suiiiciently for the introduction of thelens within its seat, after which the ring will snap back into place.

Figure 5 shows a ring having a lens seat like 81, Figure 6, and a slit28 with no handle portion. This ring may be fitted in a frame like thatin Figure 2.

Figure 7 shows a ring constructed like that shown in Figures 5 and 6with a handle portion 27 like that of Figure 4:.

In Figure 8 the bakelite ring 82 is provided with the inwardly extendingflange 88 and the outwardly extending fiange'84t. A metallic rim 85 isseated on the flange 88 which, after the lens has been seated, iscrimped thereover to firmly hold the lens in place. In Figure 9 themetallic rim 86 carries the inwardly extending projections 87, forming aseat for the lens, while the opposite end of the rim is crimped over thelens, thus forming an excellent seat and retaining means for the triallens. In Figure 10 a metallic rim like the rim 86 with the shoulder 87in Figure 9 is set into the bakelite rim in an internal groove therein,the lens being crimped in as in Figure 9.

In Figures 11 and 12 are shown a slight modification of the ring shownin Figure 4:, wherein the bakelite ring 88 is provided with the metallicrim 89. The handle l0 is connected to the rim 89 and a slit 41 passesfrom the inner surface of the ring to the hole formed in the handle 40,thus allowing the ring to be slightly enlarged to allow the insertion ofthe lens within the seat 42, after which the metallic rim 89 will causethe bakelite ring to return to its normal position. Although I havespecified the bakelite as the preferable mate rial, it is to beunderstood that other materials may be used such as cellulosecompositions or the like, although I have found bakelite to beexceptionally desirable.

It is to be understood that the forns in my invention herewith shown anddescribed are to be taken as preferred embodiment of the same and thatvarious changes in the shape, size and arrangement of parts may beresorted to without departing from the spirit of the invention or thescope of the sub-joined claims.

Having thus described my claim:

l. A. trial ring comprising a non-metallic annulus, a metallic seatsecured in the inner ring of the annulus, a portion of the metallic seatbeing adapted to be turned down to overlie the seat in spaced relationthereto.

2. A trial ring comprising a non-metallic annulus, a metallic seat inthe inner ring of the annulus having a flange in the plane of theannulus and a flange normal thereto, a lens on the first flange, and aportion out the second flange turned down to overlie the seat in spacedrelation thereto.

3. A trial ring comprising a non-metallic annulus, a metallic seat inthe inner ring invention, 1

of the annulus, comprising a flange in the plane of the annulus, aflange normal. thereto, and another flange in the plane ot' the annulussecured to the annulus to hold the seat therein, a portion of the normalllauge turned down to overlie the seat in spaced relation thereto.

-l. A trial ring comprising a composition annulus and a seat in theinner ring of the annulus, comprising a metallic ring having a flangesecured to the annulus, a flange :torming a seat, and a flange normalthere to adapted to be bent down to overlie the seat in spaced relationthereto.

A trial ring comprising a non-metallic annulus and a metallic seatsecured in the inner ring of the annulus having an annular groove, theedges of which overlie each other in spaced relation in the plane of theannulus, the open side of the groove being opposite the side of themetallic seat which contacts with the inner ring of the nonmetallicannulus.

NELSON M. BAKER.

